Is it cruel/mean of me to crate puppy when he's awake and wants to play?

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Is it cruel/mean of me to crate puppy when he's awake and wants to play?

Arthur is 9.5 weeks and goes in his crate for sleeps. Mostly when he's awake he's out with one of us and we play with him until he shows signs of tiredness.
Today he seems to be having a very awake day, coincidentally today I have loads I have to get done in the house and can't play with him as much as usual. Is it cruel to leave him in his crate/den with some toys? He's yapping at me to come out and play.
Normally he sleeps for 2 hours in the morning, today he doesn't seem tired.